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added image widget with atlas support and global texture manager

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This commit is contained in:
omigamedev
2017-02-07 23:42:39 +00:00
parent 83e59573e0
commit 5e5ddf310c
10 changed files with 167 additions and 9 deletions
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83
engine/layout.h
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@@ -31,6 +31,8 @@ enum class kAttribute : uint16_t
FontSize = const_hash("font-size"),
Justify = const_hash("justify"),
Align = const_hash("align"),
Path = const_hash("path"),
Region = const_hash("region"),
};
enum class kWidget : uint16_t
@@ -38,6 +40,7 @@ enum class kWidget : uint16_t
Border = const_hash("border"),
Shape = const_hash("shape"),
Text = const_hash("text"),
Image = const_hash("image"),
Ref = const_hash("ref"),
};
@@ -80,6 +83,10 @@ public:
glm::vec4 m_color;
glm::vec4 m_border_color;
float m_thinkness{ 1 };
static void init()
{
m_plane.create<1>(1, 1);
}
virtual std::unique_ptr<Widget> clone() override
{
auto ret = std::make_unique<WidgetBorder>();
@@ -281,6 +288,82 @@ public:
}
};
class WidgetImage : public Widget
{
public:
static Plane m_plane;
static Sampler m_sampler;
bool m_use_atlas;
glm::vec4 m_region;
glm::vec2 m_off;
glm::vec2 m_sz;
std::string m_path;
uint16_t m_id;
static void init()
{
m_plane.create<1>(1, 1);
m_sampler.create();
}
virtual std::unique_ptr<Widget> clone() override
{
auto ret = std::make_unique<WidgetImage>();
*ret = *this;
return std::move(ret);
}
virtual void create() override
{
if (TextureManager::load(m_path.c_str()))
{
auto tex_sz = TextureManager::get(m_id).size();
m_off = m_region.xy / tex_sz;
m_sz = (m_region.zw - m_region.xy) / tex_sz;
}
}
virtual void draw() override
{
TextureManager::get(m_id).bind();
m_sampler.bind(0);
if (m_use_atlas)
{
ShaderManager::use(kShader::Atlas);
ShaderManager::u_vec2(kShaderUniform::Tof, m_off);
ShaderManager::u_vec2(kShaderUniform::Tsz, m_sz);
}
else
{
ShaderManager::use(kShader::Texture);
}
ShaderManager::u_int(kShaderUniform::Tex, 0);
ShaderManager::u_mat4(kShaderUniform::MVP, mvp);
m_plane.draw_fill();
m_sampler.unbind();
TextureManager::get(m_id).unbind();
}
virtual void parse_attributes(kAttribute id, const tinyxml2::XMLAttribute* attr) override
{
switch (id)
{
case kAttribute::Path:
m_path = attr->Value();
m_id = const_hash(attr->Value());
break;
case kAttribute::Region:
{
glm::vec4 v;
int n = sscanf(attr->Value(), "%f %f %f %f", &v.x, &v.y, &v.z, &v.w);
if (n == 4)
{
m_region = v;
m_use_atlas = true;
}
break;
}
default:
break;
}
}
};
class Node
{
friend class LayoutManager;